pbReview.com / Off The Break Blind Bushmaster Bolt / Off The Break Blind Bushmaster Bolt / Off The Break Blind Bushmaster Bolt / Off The Break Blind Bushmaster Bolt / Off The Break Blind Bushmaster Bolt / Off The Break Blind Bushmaster Bolt
-It's stubby, so I experienced reduced kick
-Quality of tip has yet to be seen
-Must be lubed
-May reduce efficiency
Well this is the first Blind Bolt review, so it might as well be in-depth.
Well my B2K3 does not have PDS, so despite using a Halo I am always looking for cheap ways to reduce my risk of chopping. So I bought one of these. It cost me $35 shipped.
The back part of the bolt is made of some kind of black plastic. It is stubby and has plenty of plastic cut out of the body to reduce weight, size, and friction. The tip of the bolt is a red piece of rubber that is attatched to the plastic section of the bolt with an adhesive. The rubber part of the bolt is hollow, providing the bolt with a very large open face. This rubber is supposed to cushion the ball to prevent it from chopping. Overall the bolt is 3 5/16 inches long, about 2 inches shorter than the stock bolt.
When I tried to put the bolt in my gun, it wouldnt fit. There is a lip on the tip of the rubber piece that is supposed to prevent blowback, and it was intentionally made too big so that you can sand it down and get the perfect fit for your gun, similar to how Halo feednecks are intentionally too big. The rest of the bolt is the perfect size. I sanded the lip down until it was the right size to fit in my gun.
I just did a chrono test to see how the Blind Bolt affects the velocity of my gun. With the stock bolt I shot between 294fps and 303fps. I lubed the Blind Bolt with some Shocker lube, and it got between 280 and 290. So expect about a 10 to 15fps drop in your velocity with this bolt.
My gun also has slightly less kick with this bolt. This is probly because it is a stubby bolt.
I had 2 problems with this bolt. One was this. The front is a touch longer than the front of the stock bolt. This is probly to prevent paintballs from rolling backward in the chamber. With smaller bore paint, this worked very well. But then I tried some very large bore paint, it measured about .693 or .694. My gun was skipping every other shot. I took off my hopper and fed paint into the feedneck by hand. I would drop a ball in the feedeck, but it would get stuck because the bolt was so long in front that it partially blocked the paintball from entering the chamber. Keep in mind, this only happened with very large paint. So I sanded down the front of the bolt a bit to make it a little shorter and about 2 minutes later it worked fine.
My other problem was that the lip on the front of the bolt shot out my detents. There are two slots on the sides of the bolt, similar to the stock bolt, so that the detents dont rub against it. But they are behind the lip. So the lip on the bolt was just big enough to "grab" the o-ring detents and shoot them out. I just got 2 new o-rings, did the macroline mod, and they work perfectly now.
Some ppl have brought the strength of the adhesive that connects the rubber tip to the plastic bolt into question. Mine is working fine, but I have only had the bolt for about 2 weeks. If my rubber tip comes off I will edit this review. If this turns out to be a problem then I am sure OTB will take care of it.
So the bolt's overall performance exceeded my expectations. But I had to fiddle with it a bit before it worked perfectly. Of course sanding it to the correct bore size was expected, but my other two problems were not. Still, no big deal, they were easily corrected.
This is not a bolt that you can just put in your gun have it work. You have to do some sanding, and strengthening your detents is a good idea. But if you dont mind doing that, then this bolt is a very good (and cheap) anti-chop upgrade. combined with my Halo I have had zero chops. Although the Blind Bolt cannot prevent 99.9% of chops like PDS does, it certaintly does a good job. Anyone who cant afford PDS should get this, its a very low-cost alternative. I give a 9 because despite exceeding my expectations in terms of performance, it took a little bit of effort to get it to work that way. Also, I am holding out hope that the adhesive lasts awhile, but that has yet to be seen. Still, OTB backs their products so if it breaks they will probly help me out.
Edit: I've been using this bolt for a little over 2 and a half months now. I play every weekend, and I have yet to chop. The tip is still holding up just fine.
9 out of 10
Last edited on Wednesday, October 13th, 2004 at 8:59 am PST
I bought this bolt through pure hype, they were selling like hotcakes and i had to see what all the commotion was about. i was pretty much sold after seeing the video clip with the guy trying to chop a ball on a string, or something similar. After wasting $35 and waiting a few weeks, i finally got to play a few games with this bolt and i have to say that i was NOT impressed. At all. I've actually managed to chop a few balls when i was just throwing a slow string of paint which was pretty annoying. I'd definately say that the stock bolt performs better than this "anti-chop" bolt, since i've rarely had any chops at all with it.
Installation was very simple. When i first recieved the bolt it was too big to install, but that was nothing that sand paper couldnt fix. I used 1000-something-grit sandpaper. Bolt fit well after.
i'd give this bolt a "1" out of bitterness, but i'll give it the benefit of the doubt that it will reduce chops.
Now i know that this blind bolt hype was just that.... HYPE. I've never really payed attention to what people who actually have it have to say about it, except that they havent yet experienced an in-game chop yet. I could probably say the same about the stock bolt. I understand that this bolt wasnt meant to prevent 100% of chops, but come on...when i'm chopping way more after putting this bolt in, something's wrong. A very dissapointing product.
2 out of 10
Last edited on Monday, March 14th, 2005 at 8:26 pm PST
This thing is perfect!!!!! You will not chop. NOT CHOP.
You may loose minor efficiency.
If you got a bushy and dont have 300 bucks for a pds, get this. Its on my bushy B2k and i chop 1-2 balls a case of paint!!!!!! I have had it for months and not one problem at all its awsome. Its cheap to like 12-29 bucks. And its derlin and fits all bushys. dont get the pds its too much $$$.
Stock bolt with o-ring - blind bolt is definitely better.
Black gen 1 B2k + vapor valve, Shocktech piston, CP reg, Kapp ASA, OTB frame, CP rail AA Apocalypse.
light, tight fit
Bolt tip comes off the tip - glued, fixed
tight - need sanding
Short - must use squegee
Well, I don't have eyes and prolly will never have PDS since i'm on a budget. So this is a perfect chance for me to minimize chops, not that my gun chops a lot anyway, but for the insurance and value, i think it's a good investment.
1. Need sanding
i got the old body and it's supposedly has a tighter bore so i need to sand it down. No biggie. It's both the strength and weakness of this bolt. Strength - tight fit.
2. eliminates blowback.
I was shooting a paintball w/out a barrel and it shot out harder than the stock bolt.
3. reduce chops
I did what the video did. Hang a ball from a string and shot it multiple times and it didn't chop. It only chop when i use brittle/ cheap paint or in really cold weather where the paint shell is hard and brittle.
1. Dropped velocity because of drag from the rubber tip - mine dropped 20 fps from stock bolt
2. The rubber tip came off - put some industrial epoxy and it's ok now
3. Short - have to use squegee to pull it out
My blind bolt is broken now. The tip came off again. used Gorilla glue but it just didn't cut it and then it ripped thru the side. It was good while it last but now i think i lost some money over ths thing.
Overall value, it's a good investment and really works for me. i dunno why the guy before me said the bolt didn't work. Maybe his gun or maybe the bolt is an early product that came out of the assembly line. but it works as advertised though heard many problems with this bolt. Like i said, the tip came off, but nuthin but a liitle epoxy can't do. this works for me but with the problem that i got, ima give it an 8
It's broken now and i know how everyone's feeling about this bolt breaking, so i'll drop the review 2 points. It was good when it was functional.
6 out of 10
Last edited on Sunday, July 3rd, 2005 at 12:01 am PST