Expo Arms AR-15 Lower Parts Kit with Grip and no Trigger Group

Manufactured by Expo Arms
5 Reviews


In Stock

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The Expo Arms AR-15 Lower Parts Kit without Trigger Group is perfect for the AR enthusiast who's already settled on an aftermarket trigger. This kit includes all the small parts you'd find in a traditional lower parts kit, without the addition of a MIL-SPEC trigger that was going to wind up in a spare parts bin anyway. A traditional A2 pistol grip is included, along with an upgraded, glove friendly, billet trigger guard. Proudly made in the U.S.A.

Kit Includes:
  • A2 Pistol Grip
  • Grip Screw
  • Grip Screw Lock Washer
  • 90-degree Standard Safety Selector
  • Safety Detent
  • Safety Detent Spring
  • MIL-SPEC Bolt Catch
  • Billet Trigger Guard
  • Bolt Catch Plunger
  • Bolt Catch Roll Pin
  • Magazine Catch
  • Magazine Catch Spring
  • Magazine Release Button
  • Pivot Pin
  • Takedown Pin
  • (2) Pivot/Takedown Pin Detents
  • (2) Pivot/Takedown Pin Detent Springs
  • Buffer Retaining Pin
  • Buffer Retaining Pin Spring


BrandExpo Arms

Ratings & Reviews

5 reviews


Pivot Pin Out Of Spec

by -

Everything went in fine but the Pivot Pin. It was so oversized I had to file it down for about 30 minutes until it could properly seat itself. Expo Arms needs to do a better job with their QC. Primary Arms delivered like always with exceptional customer support.

Would not recommend

by -

The bolt catch roll pin was missing from this kit. The pivot pin was out of spec and did not fit in any of 4 different lowers I tried it with. Not impressed with the quality. I called Primary Arms and they immediately sent me new DS Arms replacement parts. I am very pleased with Primary Arms' customer service and shipping times, I just can't recommend this kit.

Excellent Value

by -

All parts fit perfectly in my lower reciever. This lower parts kit is an excellent purchase if you are doing a budget build.

Great kit but hit a snag

by -

Great kit, most of the parts were well made and the billet trigger guard is exceptional. The only issue I had was that the safety detent was oversized and would not fit into the lower receiver. At first I thought it might have been the receiver but it's from Aero Precision and I tried fitting it in two other receivers I had and it was too large for them too. I ended up using a Dremel with a sanding wheel to slim it down a bit so it would fit. It works fine now but I don't think I should have to modify any parts to get it to fit a mil spec receiver. Fix that issue and this would be a 5 star product!

Mag catch wouldn’t fit correct.

by -

I bought this kit as I already had a FCG and a grip. But the mag catch would not work with my Aero lower. Tried sanding the burrs off and no luck. Used a spikes tactical mag catch from a different gun and worked just fine. But other than mag catch it’s fine. Ordered a new black rain mag catch from primary arms to fix my issue.