2012年07月12日
Griffin Armament M4-SD Compensator
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The M4-SD Tactical Compensator from Griffin Armament is a black-oxide, stainless steel military-style muzzle device offering low concussion, flash and excellent muzzle control, as well as compatibility with a number of sound suppressors.
There has been a market for muzzle devices as far as I can remember - flash hiders, brakes, compensators etc. The standard A2 compensator is still the most economical choice, but there are always folk looking for improved performance over the standard. Flash hiders reduce flash signature while compensators or brakes either aim to reduce felt recoil or muzzle jump/movement. The idea is to keep the muzzle as neutral as possible when shooting, so that any movement seen by the shooter is due to his own input. Less movement means quicker follow-up shots, or less need to adjust one's position after firing a shot. Granted, the 5.56mm round doesn't have much recoil to begin with, but if you could make it shoot like a .22 LR, why not? For the most part, muzzle brakes do a decent job of reducing muzzle movement but at the expense of increased side blast, flash and concussion. Then there are muzzle devices that attempt to strike a balance between all the desired attributes, like the PWS FSC556 and Battlecomp.
A new entry into this market is the M4-SD tactical compensator, from Griffin Armament.
Description - The M4-SD is a military-style muzzle device, designed to reduce muzzle rise and offer recoil control, while keeping concussion and flash levels to a manageable level. The M4-SD is named after Griffin's M4-SD sound suppressor, and it's compatible with the Gemtech HALO, SRT Typhoon with Atlas mount, Quicksilver's QD223, Coastal's FDX-FHM and the AAC Omni (basically, any A2-compatible suppressor mount). It's made out of 17-4PH stainless steel, and finished in black oxide.
The M4-SD is the same 22mm (.865") diameter as the standard A2 compensator, and is 1.75" long. The main portion of the comp has a slightly reduced diameter, and has 11 rows of 5 ports/holes drilled into it. The 55 holes are .078" in diameter and have .025" chamfers. At the front are 6 holes, of the same size. The concept is similar to the KAC Triple Tap and Battlecomp, but using holes instead of slots. The comp is closed on the bottom.
The M4-SD was designed to be optimized for use with sound suppressors, and is constructed with thick walls to prevent expansion of the comp inside a suppressor under use, where it's exposed to a very harsh thermal environment. Strength is the reason why the ports are configured in rings, rather than staggering or offsetting them.
The M4-SD can be installed with a crush washer to achieve the correct clocking so that the closed section is on the bottom, but peel washers are recommended for use with some suppressor mounts. I mounted the M4-SD on my Addax Tactical ATAC GPU, which is one of my favourite uppers to shoot. It's a very soft-shooting piston upper, and feels no worse than a DI gun, unlike most other piston guns I've shot.
Article and photos from militarymorons
NEWS ARCHIVES
The M4-SD Tactical Compensator from Griffin Armament is a black-oxide, stainless steel military-style muzzle device offering low concussion, flash and excellent muzzle control, as well as compatibility with a number of sound suppressors.
There has been a market for muzzle devices as far as I can remember - flash hiders, brakes, compensators etc. The standard A2 compensator is still the most economical choice, but there are always folk looking for improved performance over the standard. Flash hiders reduce flash signature while compensators or brakes either aim to reduce felt recoil or muzzle jump/movement. The idea is to keep the muzzle as neutral as possible when shooting, so that any movement seen by the shooter is due to his own input. Less movement means quicker follow-up shots, or less need to adjust one's position after firing a shot. Granted, the 5.56mm round doesn't have much recoil to begin with, but if you could make it shoot like a .22 LR, why not? For the most part, muzzle brakes do a decent job of reducing muzzle movement but at the expense of increased side blast, flash and concussion. Then there are muzzle devices that attempt to strike a balance between all the desired attributes, like the PWS FSC556 and Battlecomp.
A new entry into this market is the M4-SD tactical compensator, from Griffin Armament.
Description - The M4-SD is a military-style muzzle device, designed to reduce muzzle rise and offer recoil control, while keeping concussion and flash levels to a manageable level. The M4-SD is named after Griffin's M4-SD sound suppressor, and it's compatible with the Gemtech HALO, SRT Typhoon with Atlas mount, Quicksilver's QD223, Coastal's FDX-FHM and the AAC Omni (basically, any A2-compatible suppressor mount). It's made out of 17-4PH stainless steel, and finished in black oxide.
The M4-SD is the same 22mm (.865") diameter as the standard A2 compensator, and is 1.75" long. The main portion of the comp has a slightly reduced diameter, and has 11 rows of 5 ports/holes drilled into it. The 55 holes are .078" in diameter and have .025" chamfers. At the front are 6 holes, of the same size. The concept is similar to the KAC Triple Tap and Battlecomp, but using holes instead of slots. The comp is closed on the bottom.
The M4-SD was designed to be optimized for use with sound suppressors, and is constructed with thick walls to prevent expansion of the comp inside a suppressor under use, where it's exposed to a very harsh thermal environment. Strength is the reason why the ports are configured in rings, rather than staggering or offsetting them.
The M4-SD can be installed with a crush washer to achieve the correct clocking so that the closed section is on the bottom, but peel washers are recommended for use with some suppressor mounts. I mounted the M4-SD on my Addax Tactical ATAC GPU, which is one of my favourite uppers to shoot. It's a very soft-shooting piston upper, and feels no worse than a DI gun, unlike most other piston guns I've shot.
Article and photos from militarymorons
NEWS ARCHIVES
Posted by echigoyaworks
at 19:00
2012年07月12日
ERGO Z Float Rail Review
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Falcon Industries’ ERGO Z Float Rail series has a unique 2-piece design that it can be installed without taking the barrel off. This handguard is great for those AR owners that don’t own any gunsmith tool and those that have an AR with permanently attached muzzle device.
To install the ERGO Z Float Rail, the Delta ring assembly needs to be removed. The simple way to do so is by cutting the ring and spring off carefully with a small rotary cutter or a hacksaw. I recommend wrapping the surrounding areas with duct taps to protect them from any slip of the cutter. Of course, if you have the proper gunsmith tools to take apart the barrel assembly, the Z Rail can be install like any typical free float handguard.
The ERGO handguard mounts on to the stock barrel nut and uses six long bolts to lock it in place. The two halves are lock together by two short tapped screws in the front and two in the back. There are cut grooves on rear of both the handguard pieces that fit on the stock barrel nut’s teeth for the proper alignment.
The new 10” extended carbine-length Z Rail M-4 “Over Shoot” model features an open-top front section to fit the A2 front sight or a rail gas block. The standard 7” model mounts flush against the front sight base. The ERGO Z Float Rail is compatible with Adams Arms and most other AR gas piston systems.
Steve Hine from Falcon Industries had informed me that they are releasing updated versions of the Z Rail handguard. The new versions have additional lightening cuts on the inner surfaces. The locking mechanism had also been simplified by eliminating the steel locking plates. The six side locking bolts are now using threaded inserts that are built into the two halve pieces. The total weight will be few ounces lighter on the new versions.
**Size**: 7-inch carbine length and 10-inch Extended Carbine Length
**Type**: Quad-rail, 2-piece design
**Weight**: 13.2 oz and 15 oz
**Construction**: CNC aircraft-grade aluminum
**Inside Diameter**: 1.15”
**Continuous Top Rail**: Yes
**Anti-Rotational Mechanism**: locks onto the stock barrel nut
**QD Sling Swivel Socket**: No
**Finishing**: Smooth Black hard coat anodized finish
**Blunted machining edges**: Yes
**Removable for maintenance**: Yes
NEWS ARCHIVES
Falcon Industries’ ERGO Z Float Rail series has a unique 2-piece design that it can be installed without taking the barrel off. This handguard is great for those AR owners that don’t own any gunsmith tool and those that have an AR with permanently attached muzzle device.
To install the ERGO Z Float Rail, the Delta ring assembly needs to be removed. The simple way to do so is by cutting the ring and spring off carefully with a small rotary cutter or a hacksaw. I recommend wrapping the surrounding areas with duct taps to protect them from any slip of the cutter. Of course, if you have the proper gunsmith tools to take apart the barrel assembly, the Z Rail can be install like any typical free float handguard.
The ERGO handguard mounts on to the stock barrel nut and uses six long bolts to lock it in place. The two halves are lock together by two short tapped screws in the front and two in the back. There are cut grooves on rear of both the handguard pieces that fit on the stock barrel nut’s teeth for the proper alignment.
The new 10” extended carbine-length Z Rail M-4 “Over Shoot” model features an open-top front section to fit the A2 front sight or a rail gas block. The standard 7” model mounts flush against the front sight base. The ERGO Z Float Rail is compatible with Adams Arms and most other AR gas piston systems.
Steve Hine from Falcon Industries had informed me that they are releasing updated versions of the Z Rail handguard. The new versions have additional lightening cuts on the inner surfaces. The locking mechanism had also been simplified by eliminating the steel locking plates. The six side locking bolts are now using threaded inserts that are built into the two halve pieces. The total weight will be few ounces lighter on the new versions.
**Size**: 7-inch carbine length and 10-inch Extended Carbine Length
**Type**: Quad-rail, 2-piece design
**Weight**: 13.2 oz and 15 oz
**Construction**: CNC aircraft-grade aluminum
**Inside Diameter**: 1.15”
**Continuous Top Rail**: Yes
**Anti-Rotational Mechanism**: locks onto the stock barrel nut
**QD Sling Swivel Socket**: No
**Finishing**: Smooth Black hard coat anodized finish
**Blunted machining edges**: Yes
**Removable for maintenance**: Yes
NEWS ARCHIVES
Posted by echigoyaworks
at 10:00
