Polymer80's 308 Warrhogg Lower Receiver Kit features an industrial-strength, injection molded, reinforced polymer receiver with a solid core designed for the DPMS-styled .308 in an 80 percent format. The 308 unit is ATF-compliant, well within their defined parameters of a receiver blank. The .308 80 percent lower receiver design features a beefed up buffer tube ring; ribbing across the entire upper surface area; no-thread design on pistol grip area; stiffened magwell with an ultra-light design. This W308 Lower Receiver kit includes: pistol grip nut and screw; Warrhogg .308 jig; end-mill bit with laser etched depth mark; drill bits for safety selector switch hole, pin holes for trigger and hammer, trigger hole; trigger guide.This model has a black finish.
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Submitted By: John M. On 04/04/2018
Just finished the drill work on the lower. It came out pretty good so far, better than the ones I saw on youtube. I have not fit the parts yet.
Overall, It was fairly easy, more finesse than skill.
What I found.
1. The instructions were very hard for me to understand. I have done a couple of metal 15 lowers so I said relied more on my experience than the instructions.
2. Do tap the spindle back up into the drill press head before beginning. I have never had this happen before but the spindle came loose right to start with. A few whacks with a large rubber fixed that.
3.Take your time! Visually confirm bit placement before each pass.Also, turning the spindle with bit in it (with drill off) helps to better align and not going in to the jig.
4. Put a depth gauge on the bits. Really helps to keep depth proper.
5. Plunge(drill) out most of Fire control group pocket material with the router bit after the safety/hammer/trigger pin starter side holes have been done.
6. Once most of the material is gone from FCG, only a few passes in milling method are needed. Align each pass by hand before beginning. Keeps the milling smoother.
That's about it. I think if I do another one it will be better still!
[3 of 5 Stars]
Submitted By: Dave S. On 01/31/2018
An amazing kit! The milling cutter alone is almost worth the $54 price. And the whole kit was only slightly more than what we had to pay an FFL for handling the lower for our first [and only other] AR build.
Polymer is a bit brittle. So care must be taken when dealing with thin areas. And the milling guide is a bit narrow…additional material must be removed [carefully] to allow proper fit of trigger group.
“Hump” on rear of receiver was too high and had to be lowered slightly to allow clearance for charging handle.
The instructions included were very helpful. But, having used a cheap Harbor Freight drill press, I found that securely clamping the jig for EVERY bore was required. After all the initial boring is done, some VERY careful free-handing is possible.
Check the rear take down pin detent hole BEFORE installing the trigger and safety selector. Ours wasn’t drilled to depth.
The lower that we received also has some minor defect in the magazine well. Magazine[s] tend to rock slightly forward when the bolt closes. When mated to a .308 upper, cartridges would NOT enter the chamber, but slipped sideways and got pinched between the bolt and barrel extension. Never did get one to feed properly.
However, when mated to a 6.5 Creedmoor upper, and using the same magazines, 6.5 Creedmoor rounds feed smoothly.
Had never built using an 80% lower before, so wasn’t sure what we’d end up with. But, overall, a good experience.
[4 of 5 Stars]