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When it comes to the fire control group on your AR-15, the hammer does a lot of quiet, unglamorous work. It cycles thousands of times, takes a beating from the spring, and has to hit the firing pin the same way every single time. This is the factory OEM mil-spec hammer from Sons of Liberty Gun Works, the same part that ships in their rifles, sold on its own so you can replace a worn one or build a lower from scratch.
SOLGW built its name in San Antonio making hard-use AR-15s that get trusted by law enforcement and folks who run their guns hard, and their whole approach is function over flash. That mindset carries straight into a small part like this. It is made in the USA to mil-spec dimensions, so it behaves the way a standard hammer should without any surprises.
This is a true mil-spec component, which means it uses the standard .154 inch pin hole that the vast majority of AR-15, M4, and M16 lowers are cut for. If your rifle runs a common two-piece fire control group, this hammer will drop in and mate up with your existing trigger, disconnector, springs, and pins. It is a straightforward match for standard lowers, though as always with proprietary or drop-in trigger setups, it is worth double-checking pin diameter before you order.
The hammer is one of those parts you rarely think about until it wears, peens, or you are mid-build and short a piece. Having a known-good OEM hammer from a maker like SOLGW takes the guesswork out of it. Armorers, home builders, and anyone maintaining a fleet of rifles tend to keep spares in the parts bin for exactly this reason. It pairs naturally with a mil-spec trigger, disconnector, and a fresh set of .154 pins if you are assembling a complete group.
Straightforward, dependable, and built by a company that obsesses over the details that keep an AR running. That is really all you want from a hammer.
It is built to standard mil-spec dimensions and uses the common .154 inch pin hole, so it fits the large majority of AR-15, M4, and M16 lowers running a standard two-piece fire control group. If your rifle uses a Colt-style large pin (.170 inch) or a proprietary drop-in trigger, confirm your pin size first. For most standard builds, it is a straight drop-in.
No, this is sold as the hammer only. You will need a hammer spring and a set of .154 mil-spec pins to install it, which are inexpensive and easy to source. If you are building or rebuilding a full fire control group, plan on grabbing those separately.
This is the factory OEM hammer, the same component Sons of Liberty Gun Works uses in their own rifles. SOLGW has a strong reputation for building dependable, hard-use ARs, and that same standard applies to their individual parts. It is a solid choice when you want a known-good replacement rather than a mystery part.
Installation is basic gunsmithing on the lower receiver. Most people use a punch, a small hammer, and ideally a hammer spring installation tool or a slave pin to make seating the spring easier. If you have swapped a fire control group before, this is a familiar job, and there are plenty of good walkthrough videos if it is your first time.
| UPC | 785939517576 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | HAMMER |
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