View Full Version : Trapdoor BPCR project

July 16, 2010, 07:28 PM
I have finally got most of the parts amassed to build up a parts gun trapdoor 45-70 for BPCR competition. - do however have a few questions I need to ask first and foremost is what parts do I need to replace to put a set trigger on this rifle? What tumbler sear etc. Also what contour of octagon barrel blank do I need to use to have everything sized properly I was thinking a #1 sharps taper.

Jim Watson
July 16, 2010, 07:58 PM
I can't help on the barrel size, maybe if you googled Gemmer Trapdoor you could get somebody to tell you what was on theirs.

The Pedersoli Officer's Model Trapdoor has a single set trigger that you might could use or copy.

July 16, 2010, 08:10 PM
Thought very hard about using the pedersoli parts was planning on it in fact just need to find out which original springfield parts I need to swap out for the pedersolli parts in the springfiels assemblies. I already have an original lock (complete) and an original rifle trigger assembly which is where all the swapping will occur right?