Complete Firearms

Explore a vast selection of NFA (National Firearms Act) complete rifles. Pick and shop complete NFA rifles from Rainier Arms and enrich your firearm collection. You can explore various calibers you wish as well as rifles from multiple well-known brands including Daniel Defense, Maxim Defense, Noveske, and Sig Sauer.

Sig Sauer MCX SPEAR 7.62X51 SBR - 13"

$4,199.99

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Battle Arms Development TANKER .223 Wylde PDW SBR - 7.5" (SPECIAL EDITION)

Special Price $2,962.92 Regular Price $3,419.99

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Sig Sauer MCX Spear-LT 7.62X39 SBR - 11"

$2,499.99

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Noveske Gen 4 AR-15 5.56 SBR - 10.5" Light Shorty
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Verified Reviewer

0.0 star rating

04/30/25

Review by Anonymous User

On

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04/30/25

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Mark F.
Verified Buyer

1.0 star rating

04/28/25

Children's Pistol Grip.

Review by Mark F. on 28 Apr 2025 review stating Children's Pistol Grip.
This would be good for kids or Women. I glad I only bought One.

On Driven Arms Co. Utility Compact Grip (ULCG Gen 2) - Apex

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04/28/25

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Justin B.
Verified Buyer

3.0 star rating

04/28/25

Needed modification

Review by Justin B. on 28 Apr 2025 review stating Needed modification
The upper seems ok. But I had to modify it to work. The ejector on would not allow the bcg to close. And that was with a QC10 lower. I manually bent it down, then filed it down some and then honed it to a smooth finish. Works great now.

On Quarter Circle 10 Complete AR-15 9mm PCC Upper - 7.5"

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04/28/25

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JG
Verified Buyer

3.0 star rating

04/27/25

Great Module but does not play well with aftermarket triggers

Review by JG on 27 Apr 2025 review stating Great Module but does not play well with aftermarket triggers
This is my second Sharps Bros grip module and I'm a long time customer. My P365 module is perfect. This one, however, I had some problems with. It seems like the cutout for the trigger is not the same dimensions as an OEM Springfield grip module. I have a popular aftermarket trigger modification in COG. It is a bit wider than the stock Springfield trigger. I tried to insert my COG into this grip module and had resistance. I looked at my COG and saw that the trigger shoe was scratched badly on the edges. I emailed Sharps about this a few weeks ago, and never heard back. I ended up filing the trigger opening out a bit so that the trigger would fit, but my PRP trigger is damaged from trying to insert it in the first place. TLDR; only use this with a completely stock trigger. No guarantee that an aftermarket trigger will work. I deducted two stars because a) the fit was poor (it should at least match the OEM fit), and b) Sharps never responded to my inquiry.

On Sharps Bros Echelon Improved Grip Module - Black / Brazilian Cherry

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04/27/25

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Aleks A.
Verified Buyer

5.0 star rating

04/27/25

Lower

Review by Aleks A. on 27 Apr 2025 review stating Lower
Excellent quality and fast shipping

On Andro Corp Industries AC-9 9mm Complete Lower Receiver - No Stock

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04/27/25

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DAN L.
Verified Buyer

5.0 star rating

04/27/25

Excellent upgrade for stacatto cs

Review by DAN L. on 27 Apr 2025 review stating Excellent upgrade for stacatto cs
I bought this for my stacatto cs because the little tab at the end of the stacatto captured guide rod assembly is not round and when reassembling the pistol the part might turn just enough to keep it from going into battery. I have the dpm systems in most of my other guns no complaints. I like that they include additional springs for tunability.

On DPM Systems Technologies Mechanical Recoil Reduction System - Staccato CS 3.5″ Bull Barrel

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04/27/25

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$2,968.75

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Maxim Defense MDX 505 PDX SBR - 5.5" Black

$2,245.50 - $2,245.50

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RogueOps RO21 5.56 NATO SBR - 11.5" (Black)

$2,250.00

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RogueOps RO21 Ambi 300BLK SBR - 8" (Black)

$2,200.00

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Sig Sauer MCX Rattler-LT 5.56 NATO SBR - 7.75"

$2,699.99

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Q LLC Mini FIX 300BLK Bolt Action SBR - 8"

$3,150.00

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Sig Sauer MCX Spear 6.8x51 SBR - 13"

$4,199.99

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Q LLC The FIX 8.6BLK Bolt-Action SBR - 12"

$3,199.00

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Sig Sauer MCX Spear-LT 5.56 NATO SBR - 11"

5.0 star rating 1 Review

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$2,499.99

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Sig Sauer MCX Spear-LT .300BLK SBR - 9"

5.0 star rating 1 Review

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$2,499.99

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Daniel Defense DD4 MK18RIII 5.56 SBR - 10.3" Black

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$2,231.00

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Noveske Ghetto Blaster SBR: Gen 4 5.56 Nato 7.94" SBR - Black

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$3,150.00

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Maxim Defense MDX 505 PDX 5.56 NATO SBR - 5.5" Urban Grey

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$2,245.50

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