Side mounted daylight scope, zeroized to 200 feet at 300 BPS (vary according to your field's rules).
possibly the new BTeTrigger (I've heard mixed feedback on this particular item) but I like three shot burst capability.
INTIMIDATION, rugged, solid marker. Looks leathal.
Good aim point off shoulder, ACCURATE
HEAVY!!!!!!!!!! Make sure you use a sling.
I am a former active Marine, and did time in the grunts. Frankly, I could shoot this sucker in my sleep. While more accurately modeled after the M4 rather than the M16, the BT4 is still familiar to any vet. I play with several and we have all gone for BT-16s or BT-4s for our woodsball play.
This sucker is heavy compare to speedball markers and has a lower BPS rate of fire, but EXTREMELY accurate over long distance with the right paint. I have made head shots on opponents where only the top of their head is exposed at over 200 feet. Speedball guys usually can't get close unless a few bum rush me at once.
It is heavy though, and I use a RAP4 quick release sling. It works, but pulls the vest slightly down on one side, I may try the RAP4 ambi-sling to even things out.
Some remarks indicate the BT-4 is a gas hog, I've only run out of air once using a 42CI 3000PSI tank, but I do not throw paint. I am a one shot, one hit player. Any marker will use air if you use the spray and pray method of trying to hit another player.
The BT-4 Assault IS NOT the same at as BT-16, for starters the ball feed on the BT-16 blocks the center line aim point, on the BT-4 the feed is slightly off center. There are some internals that are different too from what I'm told.
Regardless, with a mask on (somewhat like fam firing with a gas mask) I find it is more difficult to get good sight picture. The rear aperture flips to simulate the short and long range iron sites on a real gun. Useless in paintball IMHO.
I think a scope side mounted off the Picattinny rail (with carrying handle removed) will increase first shot accuracy. The carrying handle is useless for me I have big hands.
For a few dollars more you can get a BT4 Apex barrel and essentially have an Ironhorse (sans the picattinny rails on the fore grips and the bi-pod). But the BT-4 is heavy enough, why attach a bunch of c*** like flashlights, lasers, or grenade launchersfor show that you end up carry around?
I got mine on eBay for about $200 (new), so shop around before blowing $250+ on this marker
Definetely an intimidator when you line up with the other walk ons carrying their Spyders, Autocockers, and Angels. Does not shoot fast, but who cares how much paint you are not throwing against trees and bunkers when the one shot that hits the other player is the only one that counts.
Go for the Apex upgrade. Wave bye bye to the speed freaks as they walk off.