Self contained airsoft, pump action.

farcticox1 · Fri Mar 13, 2020 6:25 pm

Experimenting with a self contained pump action airsoft using an air cylinder and springs to provide the power. Using a 1 1/16" bore X 2 " stroke cylinder.

: m_a17020dp.jpg (3.18 KiB) Viewed 29608 times

Cylinder is on the top and facing forward which means it needs to be pushed forward to compress springs rather than backwards. Will be self loading if I can make it work, FPS is not critical as I want to use it indoors

: Pump 1.jpg (19.22 KiB) Viewed 29608 times

Xamllew · Fri Mar 13, 2020 9:24 pm

Neat idea to have the cylinder compress forward instead of back, I've seen this in Nerf guns but never an airsoft. Seems like it would be good for a compact bullpup as you seem to have.

farcticox1 · Sat Mar 14, 2020 11:25 am

If this one works I plan on building another with double the size cylinder and barrel, probably forward facing cylinder as well for the compactness.

jackssmirkingrevenge · Sun Mar 15, 2020 9:03 am

Xamllew wrote: ↑
Fri Mar 13, 2020 9:24 pm
Neat idea to have the cylinder compress forward instead of back, I've seen this in Nerf guns but never an airsoft. Seems like it would be good for a compact bullpup as you seem to have.

The original version of the Silverback SRS A1 cocked the piston on the forward stroke but most users didn't like it, they came out with a conventional rear cocking piston conversion kit shortly after and eventually phased out forward cocking altogether.

farcticox1 · Sun Mar 15, 2020 3:10 pm

the only benefit I can see from the forward cocking is it would give rearward recoil effect

farcticox1 · Sat Mar 21, 2020 7:14 pm

A bit of progress, bracket in the middle is for the grip, sprig guide needs a locking collar for the charge handle to push on, trigger not figured out yet or linkage to rear to load.

farcticox1 · Tue Mar 24, 2020 5:57 pm

trigger mechanism working with light springs on.

hectmarr · Wed Mar 25, 2020 9:00 am

Its construction looks excellent. Is it made of aluminum? or is it brass?
It looks like a super weapon for the house. Very good work!

farcticox1 · Wed Mar 25, 2020 4:39 pm

pretty much all stainless steel

farcticox1 · Thu Mar 26, 2020 6:41 pm

Got a real trigger made, pull is really light. Had to braze the springs together as the ends were binding on the guide as they moved, have 2 lengths to try.

farcticox1 · Sat Mar 28, 2020 9:27 am

Grip made from 3/4" plywood.

Trigger latch needed a bit of a detent to keep it latched

farcticox1 · Fri Apr 03, 2020 5:24 pm

More done, linkage from charge handle to rear to be made and trigger needs a return spring, power seems low but that's what I wanted. The springs are about as much as I can push, rearward charging is definitely needed for more spring tension.

farcticox1 · Tue Apr 07, 2020 6:26 pm

A few tweaks and it's ready to go back together again, just the connecting rod to make from the charge handle to the loading arm at the rear.

hectmarr · Thu Apr 09, 2020 8:49 am

You see a very good construction, (as always, in your projects). It is nice to see someone who has and carries out a project from these sides. I congratulate you, and I look forward to new things from you.

farcticox1 · Fri Apr 10, 2020 2:15 pm

Trying to make a different/better system for the spring charge/loading handle, this looks much better than the sliding handle I had at the front. The handle would jam very easy because it was trying to twist as it was sliding, the new handle takes much less effort and will be more compact. Still a work in progress

Self contained airsoft, pump action.

Donating Members