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When you've got a stripped lower sitting on the bench and you want to get it running right, the Spikes Tactical SLPK101 is the kind of kit that just works. Spike's set out to build the best factory lower parts kit on the market, and the result is a set of components that exceeds military specifications while offering noticeably better fit and finish than the cheap kits floating around. Everything is 100% made in the USA and backed by Spike's lifetime warranty, so you're not gambling on out-of-spec parts that fight you during assembly.
This is a complete standard kit, meaning the fire control group is included. You get a rounded hammer with spring that works with all calibers, a single stage trigger and spring, disconnector and spring, and stainless steel hammer and trigger pins finished in black oxide for corrosion resistance. Rounding it out is the safety selector with detent and spring, the full bolt catch assembly, magazine catch with a billet button, front pivot and rear takedown pins with their detents and springs, an aluminum trigger guard with a spring-loaded detent, buffer retainer and spring, and Spike's own Pro Grip with the screw and star lock washer.
The reason this kit earns repeat buyers comes down to consistency. Parts arrive separated into individual packaging by function, which makes following an install video painless and keeps you from hunting through a loose pile of springs. Folks building on Aero Precision, PSA, Anderson, and Spike's own lowers regularly report everything dropping in tight and clean with no fitment headaches. The rounded hammer profile is a smart touch too, since it plays nice whether you're running 5.56, .223, or another AR-compatible chambering down the line.
One detail worth calling out: Spike's tends to include a spare detent and spring for the takedown pin. Anyone who has fired a detent across the garage knows exactly why that matters. It turns a potentially ruined afternoon into a two-minute fix and makes this a solid pick for first-time builders and seasoned armorers alike.
Yes, this is the standard kit, so it comes with a complete single stage fire control group including the trigger, rounded hammer, disconnector, and all the associated springs and pins. You do not need to buy a trigger separately to finish your lower. If you plan to drop in an aftermarket trigger later, you can still use the rest of the kit's hardware.
It is built to standard mil-spec dimensions, so it fits the vast majority of AR-15 lowers on the market. Builders regularly report clean installs on Aero Precision, PSA, Anderson, and Spike's own lowers with no fitment issues. As always, a mil-spec lower is what you want for a straightforward drop-in.
The rounded hammer profile is designed to work across different AR chamberings rather than being tuned for a single cartridge. That means whether you're building in 5.56, .223, or another AR-compatible caliber, the fire control group will function correctly. It gives you flexibility if you swap uppers down the road.
Spike's typically includes an extra detent and spring for the takedown pin, which is a lifesaver during assembly. Small detents love to launch across the room, so having a backup keeps your build moving instead of stalling. The parts also arrive separated into labeled packaging to make the install easier to follow.
| UPC | 855319005426 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | SLPK101 |
| Color | Black |
| Model | |
| Product Type | Lower Parts Kit |
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