CA M15A4 weird noise

warbird · June 23rd, 2009, 20:37

Hey! I just got a BNIB M15A4 and test fired it. When I shoot it makes a weird sound, like a spring being released. like: hhhnnnnnnn with vibration? Any clues what causes this? I don't think it's normal.

Thanks.

HeadlessChicken · June 23rd, 2009, 20:56

I noticed the same noise with my CA Sportline P90. The M15A4, is it Pro or Sport?

warbird · June 23rd, 2009, 20:57

Pro. I haven't heard this before.

ujiro · June 23rd, 2009, 20:59

So what do you mean. It shoots, then sounds like its going backwards?

warbird · June 23rd, 2009, 22:36

Here's a small video. You can hear it best at the second shot.

YouTube - MVI 0273

ujiro · June 23rd, 2009, 22:41

Sounds like your anti-reversal latch may not be working. This just happened to mine, because a piece broke off of it. Check to see if it is your anti-reversal latch. If you have a spare one around, that works, or one from another gearbox.

BORDENSNIPER · June 24th, 2009, 00:35

try the anti-reversal latch

if that doesnt work try to adjust the hight of the motor

take care

Skladfin · June 24th, 2009, 13:24

no that has nothing to do with the anti reversal latch guys...

The motor adjustment and shimming is poor i believe.

hope that helps

warbird · June 24th, 2009, 17:08

Thanks, I'll try to adjust the motor height.

Do you use the middle screw underneath the grip?

ujiro · June 24th, 2009, 17:17

Yep. Middle screw. Adjust it only a little bit at a time, especially as you get closer to the sweet spot.

warbird · June 24th, 2009, 17:19

Ok, thanks. I'll go do that now!

warbird · June 24th, 2009, 17:26

Doesn't seem to do the trick.

ujiro · June 24th, 2009, 17:35

So when you shoot it. Explain exactly what you hear. Does it wind, then pop (the shooting), then sound like it winds even more?

warbird · June 24th, 2009, 17:41

Quote:

Originally Posted by ujiro

Does it wind, then pop (the shooting), then sound like it winds even more?

Exactly.

ShelledPants · June 24th, 2009, 17:43

Quote:

Originally Posted by warbird

Exactly.

Sounds like a sluggish or non-working anti-reversal latch.

Home	Forums	Register	Gallery	FAQ	Calendar
Retailers	Community	News/Info	International Retailers	IRC	Today's Posts

British Columbia	Alberta
BCAC	EAR
Op-For	JOC
Northern Arms Airsoft	Skunkworx Airsoft
Airsoft Kelowna	RAAT
Prince George Airsoft	Manitoba
Saskatchewan	MAA
SK Airsoft	Ontario
PDW	Airsoft Ottawa
South Sask Mercs	Snow Dragons
Quebec	1st Ranger Platoon
PQAC	Wolfpack Tactical
1st Pathfinders Regiment	TTAC3
Quebec Airsoft
MTX Airsoft	Atlantic
FAQc	Atlantic Airsoft

June 23rd, 2009, 20:37	#1
warbird Trader rating Join Date: Oct 2006 Location: NB, Canada	CA M15A4 weird noise Hey! I just got a BNIB M15A4 and test fired it. When I shoot it makes a weird sound, like a spring being released. like: hhhnnnnnnn with vibration? Any clues what causes this? I don't think it's normal. Thanks.

June 23rd, 2009, 20:56	#2
HeadlessChicken Trader rating Join Date: Oct 2008 Location: Toronto, Ontario, Canada	I noticed the same noise with my CA Sportline P90. The M15A4, is it Pro or Sport? __________________ "Hey I'm the first one to say its a great country but its a straaaaange culture. This is a place where gun store owners are given a list of stolen credit cards but not a list of CRIMINALS and MANIACS. And now they're thinking of banning toy guns...AND THEY'RE GONNA KEEP THE F**KING REAL ONES!" -George Carlin 1937 - 2008 (RIP buddy)

June 23rd, 2009, 20:59	#4
ujiro Trader rating Join Date: Aug 2006 Location: Burlington, ON	So what do you mean. It shoots, then sounds like its going backwards? __________________ I love freedom and consequently America

June 23rd, 2009, 20:57	#3
warbird Trader rating Join Date: Oct 2006 Location: NB, Canada	Pro. I haven't heard this before.

June 23rd, 2009, 22:36	#5
warbird Trader rating Join Date: Oct 2006 Location: NB, Canada	Here's a small video. You can hear it best at the second shot. YouTube - MVI 0273

June 23rd, 2009, 22:41	#6
ujiro Trader rating Join Date: Aug 2006 Location: Burlington, ON	Sounds like your anti-reversal latch may not be working. This just happened to mine, because a piece broke off of it. Check to see if it is your anti-reversal latch. If you have a spare one around, that works, or one from another gearbox. __________________ I love freedom and consequently America

June 24th, 2009, 00:35	#7
BORDENSNIPER Trader rating Join Date: Feb 2005	try the anti-reversal latch if that doesnt work try to adjust the hight of the motor take care

June 24th, 2009, 13:24	#8
Skladfin Trader rating Join Date: Dec 2006 Location: Glace Bay, Nova Scotia	no that has nothing to do with the anti reversal latch guys... The motor adjustment and shimming is poor i believe. hope that helps

June 24th, 2009, 17:08	#9
warbird Trader rating Join Date: Oct 2006 Location: NB, Canada	Thanks, I'll try to adjust the motor height. Do you use the middle screw underneath the grip? Last edited by warbird; June 24th, 2009 at 17:10..

June 24th, 2009, 17:17	#10
ujiro Trader rating Join Date: Aug 2006 Location: Burlington, ON	Yep. Middle screw. Adjust it only a little bit at a time, especially as you get closer to the sweet spot. __________________ I love freedom and consequently America

June 24th, 2009, 17:19	#11
warbird Trader rating Join Date: Oct 2006 Location: NB, Canada	Ok, thanks. I'll go do that now!

June 24th, 2009, 17:26	#12
warbird Trader rating Join Date: Oct 2006 Location: NB, Canada	Doesn't seem to do the trick.

June 24th, 2009, 17:35	#13
ujiro Trader rating Join Date: Aug 2006 Location: Burlington, ON	So when you shoot it. Explain exactly what you hear. Does it wind, then pop (the shooting), then sound like it winds even more? __________________ I love freedom and consequently America

CA M15A4 weird noise

Doctor's Corner