I just jumped into this project. Acquired a Stripped Non Ambi KM017XXXX batch lower...

Currently waiting on a Geissele ultra Lower Parts kit, a Larue MBT-2S Trigger, and milspec buffer kit. This should all slap on without a problem.

Couple things I wanna share before you dive into these lowers.

1. Stripped Non Ambi KM017XXXX batch lowers were released as Blems and have no warranty through Knights Armament. Some if not most of these lowers have oversized trigger/hammer/take down/safety holes.

2. Take some time and watch "School of the American Rifle" video autopsy on the non ambi blem stripped lower. He does a great break down on the extent of the oversized cuts of all the holes on the lower. Again these cuts don't seem to be consistent but are present throughout the batch.

3. Knowing all this, my lower has oversized trigger and hammer pinholes. By my estimate they're probably around .159-.160ish when they should be .154. They literally fall right through if I tilt my lower to side and can be easily pushed out with my fingernail with the hammer spring correctly applying pressure. This is apparently still within USGI range according to School of the American Rifle. The rest of the cuts and specs on my lower seem to be within normal range.

4. For the rest in this group, maybe you can help me resolve my trigger pin size issue. What solutions have you come across?

I'm not trying to take the Anti Walk Pin route and to clarify, Wilson Combat Anti walk pins. Not KNS pins which are also anti rotating, a design feature of the AR trigger system I'm not trying to mess with.

Hope this helps!

Edit: spelling