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Air Gun Home Forum Index Search found 19 matches Umarex AirMagnum 850-Walther 1250 Dominator mods   Forum: Rifles   Posted: Sun Mar 16, 2008 1:34 pm   Subject: Umarex AirMagnum 850-Walther 1250 Dominator mods dbarr   Replies: 53 Views: 123655 Nice mod from Phil! That mod from the ratkill site makes me nervous. The 850 AirMagnum wasn't designed to handle the pressure he is putting through it! DB   Umarex AirMagnum 850-Walther 1250 Dominator mods   Forum: Rifles   Posted: Fri Feb 29, 2008 2:51 pm   Subject: Umarex AirMagnum 850-Walther 1250 Dominator mods dbarr   Replies: 53 Views: 123655 Thank you Cristi! That is a great link! The differenence with the project on my blog is that I'm not satisfied with the performance of a simple HPA conversion. I am trying to figure out what modifi ...   Umarex AirMagnum 850-Walther 1250 Dominator mods   Forum: Rifles   Posted: Sun Feb 24, 2008 1:49 pm   Subject: Umarex AirMagnum 850-Walther 1250 Dominator mods dbarr   Replies: 53 Views: 123655 Sorry, forgot to post the URL ! Here it is http://airnergy.blogspot.com/ DB   Umarex AirMagnum 850-Walther 1250 Dominator mods   Forum: Rifles   Posted: Fri Feb 22, 2008 4:48 pm   Subject: Umarex AirMagnum 850-Walther 1250 Dominator mods dbarr   Replies: 53 Views: 123655 For anyone interested, I've started a blog on the subject of using air to power things. In it I am covering the conversion of an RWS 850 AirMagnum to PCP . DB   Umarex AirMagnum 850-Walther 1250 Dominator mods   Forum: Rifles   Posted: Thu Nov 15, 2007 4:26 pm   Subject: Umarex AirMagnum 850-Walther 1250 Dominator mods dbarr   Replies: 53 Views: 123655 No problem. I assume you mean the stainless steel adapter. It is a custom adapter that I made. It is made out of a piece of 5/8" diameter, stainless steel round bar. The metal stock was T-416 ro ...   Umarex/RWS/Hammerli AirMagnum 850 schematics do exist!   Forum: Rifles   Posted: Fri Sep 07, 2007 3:41 pm   Subject: Umarex/RWS/Hammerli AirMagnum 850 schematics do exist! dbarr   Replies: 20 Views: 47616 I'm sorry for the confusion! I was using the term "air cylinder" for "air reservoir." I think the other part of the confusion is about the valve. I believe there is a regulator AND ...   Umarex/RWS/Hammerli AirMagnum 850 schematics do exist!   Forum: Rifles   Posted: Fri Sep 07, 2007 2:19 pm   Subject: Umarex/RWS/Hammerli AirMagnum 850 schematics do exist! dbarr   Replies: 20 Views: 47616 I don't think they will sell different air reservoir versions, the guns would just have different valves. Like the two valves available for the Umarex 850 (the standard valve and the 16 joule export v ...   Umarex/RWS/Hammerli AirMagnum 850 schematics do exist!   Forum: Rifles   Posted: Fri Sep 07, 2007 12:28 pm   Subject: Umarex/RWS/Hammerli AirMagnum 850 schematics do exist! dbarr   Replies: 20 Views: 47616 I agree that a regulator is unnecessary, but that threaded section is brass and doesn't look long enough for the strength needed to hold 4350 psi. That is why I suspect a regulator is built into the a ...   Umarex/RWS/Hammerli AirMagnum 850 schematics do exist!   Forum: Rifles   Posted: Fri Sep 07, 2007 10:33 am   Subject: Umarex/RWS/Hammerli AirMagnum 850 schematics do exist! dbarr   Replies: 20 Views: 47616 Yah, it looks that way. I'm surprised they used brass for the valve! That brass piece that goes into the air cylinder also doesn't have a very long threaded section. The cylinder will hold 300bar/4350 ...   Umarex/RWS/Hammerli AirMagnum 850 schematics do exist!   Forum: Rifles   Posted: Thu Sep 06, 2007 4:53 pm   Subject: Dominator 1250 taken apart! dbarr   Replies: 20 Views: 47616 Hey! Just ran across this today. Someone has taken apart their Dominator 1250 and posted pictures http://www.network54.com/Forum/79537/message/1188932889/Umarex+850+-+Hammerli1250+takedown D ...   Taking apart the Airmagnum 850 in 3 steps.   Forum: Rifles   Posted: Wed Aug 01, 2007 6:48 pm   Subject: Taking apart the Airmagnum 850 in 3 steps. dbarr   Replies: 24 Views: 24977 You are fortunate! I've been thinking about getting the valve at http://www.waffenostheimer.de/catalog/product_info.php?products_id=1742 to see what they did to improve it.   Umarex AirMagnum 850-Walther 1250 Dominator mods   Forum: Rifles   Posted: Wed Aug 01, 2007 3:24 pm   Subject: Umarex AirMagnum 850-Walther 1250 Dominator mods dbarr   Replies: 53 Views: 123655 I'm sure the Walther Dominator 1250 has at least a different valve and hammer spring than the 850. It might also require a heavier duty hammer. One day, when I get braver, I might open the action on m ...   Airmagnum 850   Forum: Rifles   Posted: Wed Aug 01, 2007 3:10 pm   Subject: Airmagnum 850 dbarr   Replies: 45 Views: 42325 Actually there is a difference in the energy of the .177 vs the .22. The .22 is about 12fpe while the .177 only gives around 9.6fpe with the standard valve. See the review at http://www.pyramydair.com ...   Taking apart the Airmagnum 850 in 3 steps.   Forum: Rifles   Posted: Wed Aug 01, 2007 2:54 pm   Subject: Taking apart the Airmagnum 850 in 3 steps. dbarr   Replies: 24 Views: 24977 Broommaster, Where did you get your ventil/valve? Does Umarex make a more powerful version? Thanks, DB   Note: Crosman AirSource Adapters   Forum: Accessories   Posted: Wed Aug 01, 2007 2:44 pm   Subject: Note: Crosman AirSource Adapters dbarr   Replies: 5 Views: 10763 I'm not familiar with how the AirSource screws into the 1077, but with the 850 Airmagnum, there is an o-ring that seals around the outside of the AirSource's smooth section (before the threads). 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