AR Sponsor
Posted: 12/26/2016 2:23:35 PM EDT
| My uncle decided to come over to the EBR side and wants me to build him an upper for deer and bear hunting. He wants a 450 but I have no experience with that round. I'm assuming it fits and functions in a standard upper but Tromix has a dedicated 450 upper with an enlarged ejection port. Is an enlarged port necessary or can I go with a standard Aero upper? |
|
If you are handy enough to build AR-15's, you probably have the skills needed to open up the ejection port on a standard upper.
The process and dimensions are readily available on the web (http://450bushmaster.net/viewtopic.php?f=2&t=12877) & (https://www.youtube.com/watch?v=IhLkrtymmoI). It takes about 30 minutes and only requires a hand grinder, some masking tape, and a few small files. Good Luck, JW |
|
Quoted:
.450" Bushmaster uses .451" bullets up to 330 grns or so, requires a special magazine, factory ammo is available. .458" SOCOM uses .458" bullets up to 600 grns or so, standard GI mags, factory ammo is rare, you can handload heavy subsonics. 450B does not use special mags. You can use reg GI mags, you may have some feeding uses depending on the follower. Best way is standard mags with a signle shot follower, which can be found cheap. To OP, take a look at factory busmaster uppers, they usually mark them down significantly this time of year. |
AR Sponsor