So I attempted a Longer P17.
I bought one on boxing day for 49.99 with free shipping. It chrony at 396 FPS with Daisy 7.9grn wad cutters. After seeing Huskydude thread and having a 1377 barrel on the bench I was like HMM..
Im no machinist. Just someone willing to try.
So I hacksaw the barrel forward of the transfer port. Using my drill press I put the barrel in it. Stuck a file on the base and lowered the barrel down on it to square it up. Just using my eye to and hand to watch the barrel to see if it wobbles. Then changed to a plate of steel and sand paper to smooth it more and more.
Making a nice square cut.
Then I made a make shift lathe by putting my drill in a vise and making a barrel support from a piece of 1x2 screwed to the bench. Gave me enough support to push down with the files.
Got the barrel turned down.
So having that done, I deburred and polished the barrel face and chamber a bit.
Here where it went down hill.
So I started to drill out the upper for the larger barrel. Everything went great. I thought the barrel had enough room but caught one of the ports on the fake muzzle brake and broke it off.
I must got low blood sugar because I started to shake a bit and dropping it. Because I went to put in pin and cracked the frame.
I figure I try it.. Bandaid it back together. Loaded up same 7.9s I used for a base number. And 421 FPS. 25fps increase over stock. Loaded some 8.2s 395 FPS. I might try the blocking the air intake breech intake mod. See if I get any gains.
Now I'm gathering some parts to fix the frame and ordering another one. To make it cleaner. I think I'm just going to cut the ports off the brake from the get go. Made putting the barrel in on angle to clip in much better. And still having a tight fitting barrel.
I'm not afraid to mess up and admit it.