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The AR-57, also known as the AR Five Seven , is a Lower receiver for the AR-15/M16 rifle and an Upper receiver, firing 5.7×28mm rounds from standard FN P90 magazines. It was designed by AR57 LLC and is currently produced by AR57 of Kent, Washington, USA. The AR-57 PDW Upper is a new design on AR-15/M16 rifles, blending the AR-15/M16 lower with a lightweight, monolithic upper receiver system chambered in FN 5.7×28mm. This model is also sold as a complete rifle, supplied with two 50-round P90 magazines. The magazines mount horizontally on top of the front handguard, with brass ejecting through the magazine well. Hollow AR-15 magazines can be used to catch spent casings.
Unlike the standard AR-15 configuration which uses a gas-tube system, the AR-57 cycles via straight blowback. A full auto version exists marketed as a competitor to the P90 and other personal defense weapons.
I have a slightly used (less then 100 rounds) 7.62x39 upper.
11 in barrel 1:9.5 twist
Bcm gunfighter charging handle
Silencerco asr muzzle brake
I spray painted the upper and 2(30 round) magazines to be able to identify it from my identical 300blackout upper
BUYER PAYS SHIPPING IF NOT...
Upper for sale. No bcg or charging handle, also red dot will not include reptilia mount but will include factory mount. About 300-400rds through it. Works well with a factory buffer spring and h2 buffer. List of items below.
-aero m4e1 upper receiver
-ballistic advantage 7.5” barrel
For sale/trade is a slick side stripped upper receiver. Unknown manufacturer but it is compatible with standard AR pattern parts.
Used for approx. 400 rounds. Has a few scuffs but no major issues.
Asking $60 or trade for 200rds of 12ga or 2 bricks of 22lr.
Will ship for an additional $10
Selling my ABC Rifle Company 10" 7.62x39 complete upper ACCESSORIES NOT INCLUDED. I'm selling it to buy a different upper for the lower, it has around 500 rounds through it. I did upgrade the firing pin to an enhanced firing pin to ensure no light primer strikes on surplus ammo, I also put an...
Gonna try to sell this upper separately of my rifle.
Less than 500 rounds have been fired through this one. Always kept super clean.
Diamondback DB15 upper receiver
Aero 223 wylde 16" stainless Fluted Barrel
Ballistic Advantage LoPro Gas block
Lantac dragon muzzle brake
Selling a new AR15 upper from CBC Industries, chambered for 5.56 NATO/.223 Remington
comes with a 16" Colt Competition-style 4150 steel barrel 1/8 twist
A3 forged 7075-T6 aluminum receiver
Carbine-length gas system
12" Hera Arms free-float Key Mod handguard
Forward assist and dust cover...
Selling my complete upper in 300 AAC Blackout. Only put 80rds though it, runs great, no malfunctions.
-TNW billet upper receiver, made in Vernonia OR.
-Timber creek billet dust cover and ambi charging handle
-Areo Precision BCG
-Ballistic advantage Hanson professional 9”