I didn’t know you could cancel orders. I just emailed and asked for a cancellation. A store by my work has them in stock. Would much rather get my money back and go pick one up today
When looking online I saw a few in stock here and there.
Mem
I didn’t know you could cancel orders. I just emailed and asked for a cancellation. A store by my work has them in stock. Would much rather get my money back and go pick one up today
Has anyone had any issues with the gas piston overtravelling on a gen 1?
When I brace against an object or fire a couple grain hotter load, my gas piston seems to over travel outside of the gas block and become stuck on the outside edge. Sometimes the charging handle is enough to re align, or using a cleaning rod to pop it back into place.. but a more permanent solution would be better.
Has anyone ran into this issue and come up with a solution?
This was using 52gr pmc bulk, and 52grain remington umc. As well as my loads with 55gr eldx in front of anything more than 26.8gr of cfe223
Someone on r/canadaguns sent me a picture with the gas piston stuck about (what looked like) ~2" into the upper past the trunnion plate and they said it was stuck in that position - they couldn't put the bolt into battery. I DMed the person about what had happened but they never responded.
When it becomes "stuck on the outside edge [of the gas block]" as you're describing, it's sticking out past the trunnion plate, I'm imagining?
Have you disassembled the whole gas piston system at any point? Perhaps there was a reassembly issue?
https://www.crusaderarms.ca/manual-download
(page 15 for gas piston disassembly instructions)
I've shot lots of PMC Bronze and X-Tac 5.56, both in 55gr (there's a 62gr X-Tac, but I haven't tried it) and never experienced what you're describing. I don't know whether 3gr of bullet weight would affect the muzzle velocity/gas velocity enough to make the difference, but you never know!
Possibly the gas block is somehow slightly out of alignment coming from the manufacturer (?).
Someone on r/canadaguns sent me a picture with the gas piston stuck about (what looked like) ~2" into the upper past the trunnion plate and they said it was stuck in that position - they couldn't put the bolt into battery. I DMed the person about what had happened but they never responded.
When it becomes "stuck on the outside edge [of the gas block]" as you're describing, it's sticking out past the trunnion plate, I'm imagining?
Have you disassembled the whole gas piston system at any point? Perhaps there was a reassembly issue?
https://www.crusaderarms.ca/manual-download
(page 15 for gas piston disassembly instructions)
I've shot lots of PMC Bronze and X-Tac 5.56, both in 55gr (there's a 62gr X-Tac, but I haven't tried it) and never experienced what you're describing. I don't know whether 3gr of bullet weight would affect the muzzle velocity/gas velocity enough to make the difference, but you never know!
Possibly the gas block is somehow slightly out of alignment coming from the manufacturer (?).
No problem with my gen 2 so far.
Not implying that's what you did but have you serviced your piston? You have to make sure your gas plug is screwed all the way when re-assemblying. Due to shooting vibrations after a long period without checkimg, If the plug gets loose, it moves forward a bit thus allowing the piston moving further forward upon return to posn and getting the tail out of the receiver.
As part of regular maintenance, plug and piston should be regularly cleaned and re-assembled. If not, at least perform visual inspection making sure the plug is tight. A bit like the M14/M305 where we needed to check (and often retight the plug). Albei on my Templar, it never loosened at all during a session.
Mem
Crusader Arms / Spectre LTD said:
I have had it apart for cleaning before, and i dont believe the gas block is out of alignment as its located via the set screws in the bottom of the gas block and corresponding pilot holes in the barrel. Potentially maybe the barrel has become loose and started walking out and become cantered, but im doubtful.
Looks like base buffer tube version is now $1599, down from $1699, maybe in response to the Type 81 underfolder, Raven 5.56, BCL Siberian. Not up to date on website, but from Instagram:
Also buffer tube Crux 308 is $2499. Have the issues previously seen in the .308 version been dealt with, or is it still a worry?
It is possible for the barrel to become loose when the four screws on either side of the upper receiver that hold the trunnion plate in plate become loose, per this reply earlier in this thread:
https://www.canadiangunnutz.com/for...pectre-LTD?p=19460016&viewfull=1#post19460016
Perhaps really tighten in sequence all the screws holding the trunnion plate in place, loctite and witness mark with small pen marks to watch for walk out in future? If the trunnion plate is loose, then the rod could be pushed out of alignment as it's pushed to the end of its travel length, and then not slide back into the gas block correctly, getting stuck outside. It seems pretty clear by the witness mark that it isn't sliding home correctly, and to my eyes the only way that's physically possible is if a) the rod is bent slightly, b) the gas block is unaligned (which you say can't be possible in this case) or c) the trunnion plate is loose.
In your position, I would firmly grasp the upper (or put it in the vise) and see if there is play (even by a tiny amount) in the barrel alignment by pushing on the muzzle end . If there is, that's a possible cause. if you don't feel any play, check the tightness of the screws holding the trunnion plate (no. 5 on the parts diagram in the manual), loctite and witness - maybe there's just enough play when under the pressures of firing that it deforms just enough. I've added checking screw tightness to my maintenance routine for the Templar Gen 1 upper on my Crusader 9, but since I loctited everything, I haven't really seen an issue.
I guess another thing you could do is remove the piston rod and just roll it along a very flat, level surface and see if it's bent (even slightly) in one direction or another.
If you discover the cause of the issue (and hopefully the fix) can you please post here and I'll add it to the maintenance thread I maintain over at Reddit.
Unfortunately, the trunnion plate is not loose. Ive been over all the screws, and have lostited them before. I havent noticed any in and out movement of the barrel, but i have noticed some wobble that i have assumed normal to the "free float" design. The radial movement is not more than 1/16" at the end of the muzzle, with no radial play at the barrel nut
Ill check that the piston is straight later today after work.
Last night i assmbled the gas system and attempted push the rod through as far as i could. If my measurements are correct, the piston is 1½" inside the the gas block at rest. The furthest i could push it by hand with the spring installed was 1¼", leaving ¼" of the piston head still within the gas block, ¼" passed the relief ports in the block. I couldnt push it to the point of coming out of the block as hard as i tried by hand, which would require 1½" of travel.
I have contacted Crusader arms to see what they say about it, so ill gladly post what the solution is as soon as i can.
Is the spring fully compressed when you press it in by hand, that is, the rings of the spring are completely next to each other and there is no possible extra compression? I guess not, or otherwise it wouldn't be physically possible for what it happening to be happening.
Yeah, sounds like a bit of a mystery. I wish you luck!
How does your piston spring looks? Approx, how many rounds have you fired thru the rifle so far?
I'm guessing that the fully compressed spring is what limits rearward travel of the piston on rearward movement. If the spring is damaged or bent, it could allow for further movement rearward.
Mem
Is the spring fully compressed when you press it in by hand, that is, the coils of the spring are completely next to each other and there is no possible extra compression? I guess not, or otherwise it wouldn't be physically possible for what is happening to be happening.
Yeah, sounds like a bit of a mystery. I wish you luck!
Hey, sorry i missed this.
Yes, the spring when compressed by hand, is fully compressed, albeit hard to see.
It really is quiet puzzling. There is no reason it should be happening, but somehow, it is. ��
I mean, physical things do super weird things at really high pressures and temperatures, in time segments us humans can't perceive. Clearly it is happening, so we have to figure out how. No word back from Crusader Arms, I assume?
I was thinking about your picture of the witness marks on the gas block - the mean point of impact of the various marks seems to be roughly at the 5 o'clock position relative to the piston hole, so the piston is bent downwards and to the right when it hits and gets stuck, right?
What would be pushing it upwards and to the left, if anything? Or, conversely, is the gas block slightly out of position (higher and further to the left than it should be)?