Description
Anyone who has built or worked on an AR-15 knows the story: you're seating a detent, the spring gets away from you, and now a tiny pin is somewhere on the floor or lost to the carpet monster forever. The Strike Industries AR-15 Lower Receiver Pin Kit exists for exactly that moment. It's a compact set of the small, easy-to-lose pins and detents that live inside a mil-spec lower, giving you spares on hand so a dropped part doesn't turn into a canceled range day.
Every piece in this kit is machined from steel and finished in matte black, so it holds up to repeated assembly and disassembly without wearing out or looking rough. These are built to industry-standard dimensions, which means they drop into any mil-spec AR-15 lower without fuss or fitting.
What the Strike Industries Pin Kit Covers
This kit rounds up the usual suspects that fingers and pliers tend to launch across the room. You get the takedown and pivot pins, their matching detents, the hammer and trigger pins, the safety selector detent, the buffer retainer pin, plus the bolt catch plunger and roll pin. It's a well-thought-out spread of the parts most likely to walk off during a build or a parts swap.
Fitment Notes for the SI-AR-LRPK
This is an AR-15 kit, plain and simple. It's designed for mil-spec AR-15 lower receivers, so it's a natural fit whether you're assembling a stripped lower or refreshing worn parts on an older build. Worth knowing before you order for a larger platform: the bolt catch roll pin, pivot pin, and takedown pin are not compatible with AR-10 lowers, so keep this one on the AR-15 bench.
Whether you're a hobby builder who likes a backup stash or someone who just wants insurance against the carpet monster, this is a cheap piece of peace of mind that earns its spot in the toolbox.
Key Specifications
- Manufacturer: Strike Industries
- Manufacturer Part Number: SI-AR-LRPK
- UPC: 700371179984
- Platform: AR-15
- Material: Steel
- Finish: Matte Black
- Compatibility: Mil-Spec AR-15 Lower Receivers
- Color: Black
What’s Included
- 1x Takedown pin
- 1x Pivot pin
- 1x Hammer pin
- 1x Trigger pin
- 1x Buffer retainer pin
- 1x Bolt catch plunger
- 1x Bolt catch roll pin
- 1x Takedown pin detent
- 1x Pivot pin detent
- 1x Safety detent
Frequently Asked Questions
Will this pin kit fit any AR-15 lower receiver?
Yes, it's built to mil-spec dimensions and works with standard AR-15 lower receivers. The pins and detents drop right in without any fitting or modification. It's a straightforward fit for both new builds and repairs.
Does the Strike Industries pin kit work with an AR-10?
No, this is an AR-15 specific kit. The bolt catch roll pin, pivot pin, and takedown pin are not compatible with AR-10 lower receivers. If you're building on the larger platform, you'll want an AR-10 specific set.
What are these pins made of?
Every piece is machined from steel with a matte black finish. That makes them durable enough for repeated assembly and disassembly, and the coating helps keep them looking clean over time.
Is this the full Pro gunsmith kit or the basic set?
This is the standard SI-AR-LRPK single set, which covers the essential pins and detents for one lower receiver. If you need bulk quantities for a shop or repeated builds, Strike Industries also offers a separate Pro gunsmith kit with multiples of each part.





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