Adams Arms .750 P Series Non-Adjustable Gas Piston Kit Low Profile Fixed Micro Block AR15 AR-15

Adams Arms .750 P Series Non-Adjustable Gas Piston Kit Low Profile Fixed Micro Block AR15 AR-15

Part Number:FGAA-031
Retail Price:$274.99
In Stock.

Choose Options

Upgrade to Low Mass Lifecoat Carrier [+$30.00]
Upgrade to Low Mass Nickel Boron Carrier [+$40.00]
Add Adams BCG Completion Kit (Bolt, Firing Pin, Cam Pin, Cotter Pin) [+$87.95]
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Adams Arms P Series Non-Adjustable Gas Piston Kit Low Profile Fixed Micro Block AR15 AR-15

THESE ARE NON ADJUSTABLE, CONCEALABLE, GAS BLOCK PISTON CONVERSION KITS AND REPLACE THE XLP (35% lighter!). They are designed to retrofit a direct gas impingement system (i.e. upper with a gas tube) and change it to a clean running, ultra reliable, piston system. Base Kits DO NOT INCLUDE BOLT/FIRING PIN/CAM PIN (UNLESS UPGRADED FOR ADDED COST WITH OPTION BELOW). BCG AND RIFLE PICS ARE EXAMPLES OF COMPLETED BUILDS.

Adams Arm's AR-15 conversion kit system is compatible with 223 Remington / 5.56 NATO, 6.5 Grendel (6.5x38mm), 6.8x43mm Remington SPC, and 5.45x39mm calibers. 

Kit includes:

    Patented Lifecoated One-Piece Bolt Carrier
    P Series Micro Block - Non Adjustable only 3.8 oz weight
    Upper Receiver Bushing
    Bushing Installation Rod
    Bolt Spring
    Drive Rod with Bushing and Spring
    Installation Instruction Card

The Adams Arms Piston System:

    A short stroke free floating piston system.
    Is Self-Cleaning.
    Carbon and gases are expelled forward, away from operator.
    Corrosive resistant coating processes.
    Harmonics are not transferred into the barrel.
    Doesn't vent directly to atmospheric pressure; this eliminates flash signature and super sonic crack which is optimal for night vision and suppresses fire.
    Has a Lifetime Warranty.


To select the correct length kit, use the following measurements:

    Pistol: 4.846" from barrel extension to shoulder PKP FGAA-03102
    Carbine: 7.866" from barrel extension to shoulder PKC FGAA-03105
    Mid: 9.866" from barrel extension to shoulder PKM FGAA-03108
    Rifle: 13.241" from barrel extension to shoulder PKR FGAA-03111

We recommend using a standard barrel nut or barrel nut with similar measurements for proper fit and function of the kit. Many aftermarket proprietary barrel nuts do not offer the clearance for the drive rod or proper seating of the spring and bushing.

Micro Gas Blocks should have the set screws torqued to 87 in-lbs

LifeCoat is more than just an application or coating processes. It is the most technologically advanced coating processes, material and machining available on the market today. LifeCoat is the idea that certain processes and materials are superior for their applicable needs and when combined they offer efficiencies unparalleled to anything currently available.

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