READ THE POST BEFORE YOU VOTE AND THEN POST WHY YOU MADE THAT CHOICE

This question is intended for experienced players only. So I've been using my CA M15A4 for a while now and I have an M120 spring in it which gives me 396 fps every time. However, the accuracy of my gun really isn't that great. I was shooting in my backyard (haven't done that in a while) and from only ~30 feet away, I could see that my bbs did not shoot in the same location every time.

So, I was thinking of buying a tightbore barrel and putting my stock CA spring back in -- since a tightbore + an m120 would be over 400 fps. Do you think this will be a good decision? I've used a tighbore barrel before but never in my M15.

Things that may help you
My M15 has a 4x32 scope that I use all the time so I typically do a lot of long distance shooting and spotting. Rarely do I use full auto because that's the only time my guns have broken, but it would also be very nice to know that my Rate of Fire will be faster so I can use it when I have to. I use Excel .25 gram bbs and I generally shoot through about 1000 to 2000 rounds in a day.

If you're talking about systema springs than M120 and tightbore would be sweet, well for chornoing you must use .20's.... so why not turn down hop up...and pass it, or take M110 Spring and tightbore.

Michael, adjusting your hopup for crono'ing against the rules. It gives a false reading and lets you take a hot gun into a game. It goes against the honor of airsoft and MILSIM in general. Do not do that.

Firing in semi or full doesn't make a difference in the long run unless you lay on the trigger. You can use full auto and shoot bursts and it will not shorten the life span of your gun significantly.

I suggest this: M110, tightbore, new hopup. I hate CA hopups with a passion.

Michael, that would be considered cheating and you're coming really close to getting banned. It's people like you who shouldn't be playing airsoft -- a sport based on the HONOR system. I've been playing longer than you and I know that I have to use .20's for chronoing my gun.

Leet, The CA spring alone is pretty nice so I really don't plan on getting an M110 unless my fps is under 375. However, what would you suggest for a good hopup? I haven't really had any problems with mine other than having to turn it up almost all the way for it to really work, but I know a quality one can increase FPS.

I'm not sure if your FPS will go up, and I don't know much about m16 hopups (besides that they are poorly designed compared to AK or SIG hopups), but I'm sure that any aftermarket design would fix your CA woes.

I've got a TM hopup in my TM m4 (and a TB) and the accuracy is great, even with the "commando" length barrel.

adam, why dont you just try and put the tightbore in there along with the 120 and see if your FPS goes up. when i put my tightbore in my G36 i didnt see any difference in FPS

Maybe try a PDI 150% spring, good tightbore barrel, improved hop-up unit, and good hop-up bucking. Depending on the particular parts, that can put you near 400 fps.

But between stock spring and tightbore vs M120 and stock barrel, I'd go tightbore barrel.

birdman wrote:

adam, why dont you just try and put the tightbore in there along with the 120 and see if your FPS goes up. when i put my tightbore in my G36 i didnt see any difference in FPS

Three reasons. 1, I don't want to arrive at a game and find out the hard way that it does increase my fps; 2, I only have 4 fps to work with before I go over the limit; and 3, I am almost positive it increased my fps when I used it in my M4 since I didn't make any other modifications to the gun.

well depending on when your going to buy if you do i was planning on buying a chronograph

A few things - I voted for a tightbore barrel.


Switch to the tightbore and back to the standard CA spring. This will affect accuracy, which is what you're looking for. The standard CA spring will keep your FPS at a good level. I see you use .25s, which is good.

A tightbore will give you a teeny tiny boost in FPS, not much, maybe only a few extra feet per second.

Laying on the trigger or bursting will affect your accuracy - trigger control in bursts of 3-5 is about the best grounds for sacrificing accuracy and still getting a large enough volume of rounds out to make the other person notice (I find that one shot doesn't always do the trick, since a lot of factors - including the "what the hell was that?" reaction don't always get people's attention they've been hit....but I digress....).

Inherently, airsoft guns are not accurate. They are not tack drivers. Hitting something along the lines of a pie plate sized object at your optimal range should be your goal - I'm not saying it could be more accurate than that, but I am saying that it's a good goal to have considering all the factors that affect an AEG and it's performance (wind, weather, BBs, etc.).

People seem to forget that 400FPS is a limit, not a goal.

Thanks Knight. Another thing I noticed is that when I use my stock spring, I won't be as concerned about burst shooting since the spring can be "wound-up" without the same amount of tension.

Knight wrote:

People seem to forget that 400FPS is a limit, not a goal.

Some people forget it's a rule too

Get a bearing spring guide, should help prevent the spring from binding up. There's a video around somewhere that shows the difference between bearing and non-bearing. I'll post again if I can find it.

I've got one. In fact, I will probably be installing my old Systema Silent Piston head (which comes with a bearing spring guide) as well as the TB unless you have any opinions on it Knight.

You don't really need all that junk in your gun, but that being said...if you have it you might as well use it.

The spring guide wouldn't hurt, though, I'd definately toss that in there.