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Lower Receiver Parts

96 of 124 Items
  • Geissele Super Semi-Auto 2-Stage Trigger (SSA) Geissele Super Semi-Auto 2-Stage Trigger (SSA)

    Geissele Super Semi-Auto 2-Stage Trigger (SSA)

    The Geissele Super Semi-Automatic (SSA®) trigger is a semi-automatic only version of Geissele Automatics’s Super Select-Fire trigger. The SSA is a non-adjustable combat trigger that is a precision two-stage trigger and allows precise and...

    $240.00
    OUT OF STOCK
  • LMT Carbine H Weight 5.56 Buffer

    LMT Carbine H Weight 5.56 Buffer

    Heavy Carbine Buffer, best used with full-auto 5.56 direct impingement rifle systems Features: H weight Carbine AR-15 Buffer Contains 2 Stainless Steel Weights and 1 Tungsten weight. Mil-Spec product.  NSN: 1005-00-914-4578 MADE IN USA

    $37.00
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  • LMT QD Endplate

    LMT QD Endplate

    LMT® manufactured receiver endplate with QD swivel insertion point. Featuring a low profile, slim design, the L7A2DERRR is a great upgrade on your current rifle or a great addition to your next build. This end plate is now standard equipment all MARS...

    $24.00
    OUT OF STOCK
  • LMT 5.56 Receiver Extension Tube

    LMT 5.56 Receiver Extension Tube

    Our favorite receiver extension tube on the market. Slightly oversized for a very tight stock fit. There's no slop when you use this tube.  Features: Milspec 5.56 receiver extension 6-postion Slightly oversized for tight fit NSN:...

    $49.00
    OUT OF STOCK
  • LMT 5.56 Lower Parts Kit Light

    LMT 5.56 Lower Parts Kit Light

    LMT 5.56 Lower Parts Kit Light By popular demand, we’ve established a lower parts kit less the trigger group. While our two-stage trigger group is among the best on the market, we realize you may prefer drop-in trigger groups or various other...

    $139.00
    OUT OF STOCK
  • Geissele SPR 42 Tungsten Buffer Weight Geissele SPR 42 Tungsten Buffer Weight

    Geissele SPR 42 Tungsten Buffer Weight

    1 Tungsten weight to add over all weight to your buffer setup. H2 Requires 1 extra Tungsten weight. H3 Requires 2 extra Tungsten weights. To change the Geissele Automatics H1 Buffer assembly to the heavier H2 or H3 buffer setup, you will need to...

    $20.00
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  • Bushmaster LOST PARTS KIT (Springs & Pins)

    Bushmaster LOST PARTS KIT (Springs & Pins)

    ***We do not recommend this kit for a new build*** However, this is a great kit to keep in your range bag for emergency gunsmithing that may happen at the range.  Includes commonly lost small parts for the AR-15:  Takedown Pin Detents...

    $17.00
    OUT OF STOCK
  • BAD Enhanced Titanium Pin Set (AR-15, Black) BAD Enhanced Titanium Pin Set (AR-15, Black)

    BAD Enhanced Titanium Pin Set (AR-15, Black)

    Battle Arms Development Enhanced Pin Set (BAD-EPS-Ti) for the AR15 / M16 / M4 style rifles. The set consists of the Enhanced Takedown Pin - Titanium (BAD-ETP-Ti) and Enhanced Pivot Pin - Titanium (BAD-EPP-Ti). Precision CNC machined from Grade 5 Titanium...

    $39.95
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  • Geissele Maritime Bolt Catch (AR-15) Geissele Maritime Bolt Catch (AR-15) Geissele Maritime Bolt Catch (AR-15)

    Geissele Maritime Bolt Catch (AR-15)

    The Geissele Maritime Bolt Catch is designed with the warfighter in mind and will work with any lower receiver designed to accept a mil-spec M16/M4 Carbine bolt catch. The increased surface area promotes ease of function when locking back the bolt or...

    $29.00
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  • Geissele 2 Stage G2S AR Trigger Geissele 2 Stage G2S AR Trigger

    Geissele 2 Stage G2S AR Trigger

    The Geissele 2 Stage (G2S) was designed to be a high quality, cost effective option of the SSA. The G2S is a non-adjustable combat trigger that is a precision two-stage trigger and allows precise and accurate trigger control. The G2S is manufactured from...

    $165.00
    OUT OF STOCK
  • Sionics Pivot Pin/Takedown Pin Detent Spring

    Sionics Pivot Pin/Takedown Pin Detent Spring

    This Sionics Pivot Pin/Takedown Pin Detent Spring is a Mil-Spec part. Stock a few extra because if you haven't, you will eventually launch one across the room. True Mil-Spec Part AR-15 Lowers require 2 springs Sold individually Detents not...

    $0.95
    OUT OF STOCK
  • Sionics Mil-Spec Take-Down Detent

    Sionics Mil-Spec Take-Down Detent

    This is a Mil-Spec Takedown/Pivot Detent. Because we've all shot them across the room...  Contains 1 detent (AR's need 2) Mil-Spec Part Detent Springs sold separately HERE MADE IN USA  

    $0.99
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  • Sionics H3 Buffer Sionics H3 Buffer

    Sionics H3 Buffer

    Sionics Mil-Spec H3 buffer. Pairs best with a SpringCo "Blue" Action Spring sold HERE. Features: True Mil-Spec Construction Contains: 3 Tungsten Weights  Weight: 5.4oz. MADE IN USA

    $35.99
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  • Sionics H Buffer Sionics H Buffer

    Sionics H Buffer

    Sionics Mil-Spec H buffer. This is an excellent choice for any AR with a barrel length from 14.5" - 18".  Pairs best with a SpringCo "Blue" Action Spring sold HERE. Features: True Mil-Spec Part Contains: 1 Tungsten Weights + 2 Stainless Steel...

    $19.95
    OUT OF STOCK
  • MAGPUL MIAD/MOE Lube Bottle Grip Core MAGPUL MIAD/MOE Lube Bottle Grip Core MAGPUL MIAD/MOE Lube Bottle Grip Core MAGPUL MIAD/MOE Lube Bottle Grip Core

    MAGPUL MIAD/MOE Lube Bottle Grip Core

    The MIAD/MOE Lube Bottle Core is an internal grip core that holds an included 1/2 oz. reusable lubrication bottle. Features: Works with the MOE, MOE-K2®, and MOE AK Grips. Holds 1/2oz. of Lube Sold Empty (we recommend Machine Gunner's Lube or...

    $14.20
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  • SB Tactical SBA3 Pistol Brace (FDE) SB Tactical SBA3 Pistol Brace (FDE) SB Tactical SBA3 Pistol Brace (FDE)

    SB Tactical SBA3 Pistol Brace (FDE)

    Designed for all platforms capable of accepting a mil-spec carbine receiver extension, the SBA3 is 5-position adjustable, dramatically enhances versatility, and features a minimalist design with an integral, ambidextrous QD sling socket...

    $129.99
    OUT OF STOCK
  • BCM GUNFIGHTER QD End Plate BCM GUNFIGHTER QD End Plate BCM GUNFIGHTER QD End Plate

    BCM GUNFIGHTER QD End Plate

    The BCM Receiver End Plate, with a socket for a Quick Disconnect swivel, is the perfect addition to your AR. It's machined from steel, and easily accommodates proper staking. Features: Machined steel! Phosphate Finished  Accepts all...

    $16.95
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  • Sionics H2 Buffer Sionics H2 Buffer Sionics H2 Buffer

    Sionics H2 Buffer

    This is a true Mil-Spec H2 buffer, the same is currently used in the M4A1 Rifle purchased by the US Military.  This is an excellent choice for any AR with a barrel length from 10.3" - 14.5". Pairs best with a SpringCo "Blue" Action Spring sold...

    MSRP: $30.95
    $29.95
    OUT OF STOCK
  • Sionics Ambi Safety Selector Short

    Sionics Ambi Safety Selector Short

    The SIONICS Ambi Safety Selector Short is a Mil-Spec Safety with one arm shortened to deal with the clearance issues caused by hand location. This is a solid reliable choice and represents a great value in quality ambi parts.  Includes: Ambi...

    MSRP: $34.95
    $30.00
    OUT OF STOCK
  • SB Tactical SBA3 Pistol Brace (BLACK) SB Tactical SBA3 Pistol Brace (BLACK) SB Tactical SBA3 Pistol Brace (BLACK)

    SB Tactical SBA3 Pistol Brace (BLACK)

    Designed for all platforms capable of accepting a mil-spec carbine receiver extension, the SBA3 is 5-position adjustable, dramatically enhances versatility, and features a minimalist design with an integral, ambidextrous QD sling socket...

    $129.99
    OUT OF STOCK
  • Tactical Springs "RED" Action/Buffer Spring Tactical Springs "RED" Action/Buffer Spring Tactical Springs "RED" Action/Buffer Spring

    Tactical Springs "RED" Action/Buffer Spring

    “RED Spring” EXTRA Power Buffer Spring, Best option for 16"+ 5.56 barrels with carbine length gas system platforms with standard front sight towers and H buffers, 16" + BBL gas piston guns, *some* suppressed shorties,and later generation Colt...

    $19.95
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  • Tactical Springs "WHITE/RED" Action/Buffer Spring Tactical Springs "WHITE/RED" Action/Buffer Spring Tactical Springs "WHITE/RED" Action/Buffer Spring

    Tactical Springs "WHITE/RED" Action/Buffer Spring

     INTERMEDIATE POWER RED/WHITE, “HOT WHITE” Moly- Plated Chrome Silicon CARBINE Buffer Spring in Hard Tube.\ WHAT MAKES OUR SPRINGS UNIQUE? All of our springs are constructed from Certified Chrome Silicon wirestock to ISO 9001:2008...

    $19.95
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  • Tactical Springs "GREEN" Action/Buffer Spring Tactical Springs "GREEN" Action/Buffer Spring Tactical Springs "GREEN" Action/Buffer Spring

    Tactical Springs "GREEN" Action/Buffer Spring

    "GREEN Spring" In addition to use in 5.56 Fixed Stock Rifles, our “GREEN Spring” is just the ticket for use in the VLTOR A-5 Stock System using their appropriate weight buffer for maximum versatility in tuning almost any upper configuration,...

    $19.95
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96 of 124 Items

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