Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage

Makes Rifle Run Cooler, Cleaner, Smoother For Improved Function, Reduced Recoil & Less Frequent Cleaning

Drop-in conversion kit replaces the standard direct impingement gas system with a reliable, positive cycling piston system. Updates the AR to the type of operating system used on advanced weapons like the FN SCAR, Heckler & Koch G36, and HK416, as well as the highly reliable, classic FAL and AK-series rifles. Makes weapon run cooler, smoother, and more reliably, with less wear and easier maintenance. Because the gas no longer vents inside the receiver, fouling and carbon buildup are greatly reduced, requiring less frequent disassembly for cleaning. Less fouling and lower operating temperatures mean reduced wear on bolt, carrier, and receiver interior for fewer malfunctions caused by worn parts. Piston’s cushioning effect reduces felt recoil to help you stay on target for better control during rapid fire and fast, accurate follow-up shots. “Straight-line” design of the replacement gas block further ensures reliable operation by venting gas pressure directly on the operating rod. Rod transmits the force directly to a lug on the top side of the one-piece bolt carrier. Redesigned carrier is machined from a solid billet of steel with an integral impingement lug to eliminate breakage that can occur with a standard carrier modified for use with a gas piston system. A knob on the gas block allows gas flow to be shut off to allow use of a suppressor or a .22 LR conversion kit. Picatinny cuts on top of gas block accept aftermarket, bolt-on front sights. Kit may be installed on semi-auto and burst/full-auto rifles, as well as ARs chambered in non-standard calibers, including 6.8 SPC and 5.45 x 39. Models available to fit rifles with Carbine-length and Mid-Length gas systems. Requires no permanent alterations to barrel or upper receiver; remove piston system any time and reinstall the original parts. Gunsmith installation recommended.

AR-15, Issue:09, Page:014
Big Book Catalog, Issue:67, Page:017
New Product Supplement, Issue:621, Page:018

SPECS: Piston Tube, Bolt Carrier, Handguard Retainer Cap – Steel, black oxide finish. Piston – Steel, hard-chromed. Gas Block – Aluminum, hardcoat anodized, matte black. Includes mounting hardware and installation instructions. Does not include bolt assembly. Carbine kit fits semi-auto and burst/full-auto rifles with carbine-length gas system and .750" O.D. barrel at gas port. Includes reinforced polymer composite handguard, black. Mid-Length kit fits semi-auto and burst/full-auto rifles with mid-length gas system and .750" O.D. barrel at gas port.


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Gas Piston Conversion Kit, Mid-Length
100005840Gas Piston Conversion Kit, Mid-Length

Mfr Part: 55BA654


In Stock - Special Order
This is a special order item that will require additional processing time. The special order department will provide you with current price & delivery time.
Gas Piston Conversion Kit, Carbine
100004370Gas Piston Conversion Kit, Carbine

Mfr Part: 55BA62E


Discontinued Only 10 left.