Dynamic .25 cal PCP - First Impressions and Observtions

[Bob Pratl]

It looks like Aim Sports is determined to make their company a success and are taking the right steps to insure it. I'm very happy with my DAR 25 after doing my own QC and corrected a lot of minor problems. I love the design and platform and with good QC it can be rated as a Premium Air Gun, without a doubt. I'm looking forward to see what GEN II has to offer because I would like to add a .177 to my arsenal.   

[Wolverineshooter]

Ed from Aimsports wrote to me "If you do not wish to be refunded for the item, it can be sent to us and logged for a Gen 2 upgrade at no additional charge. The Gen 2 models are expected sometime mid 2019." So if we were going to get Gen2, likely it will be 8-12 months wait. Hard to be without these rifles for that long.

[nervoustrigger]

Guys, if anyone is struggling with a leak, here are my detailed O-ring notes so far.  You'll see plenty of improvisation but there are many ways to get air to stay where you want it so by all means experiment with it.  This is just what has worked for me.

Regulator body: 2ea -117 90 durometer.  The original high side O-ring, an M2.5x20 estimated 50 durometer, extruded after a few days and dumped all the air through the atmospheric vent hole.

Regulator spool, top: -012 90 durometer, very snug but didn't shear on installation.  Original was M1.5x9 and was sloughing off material after ~400 pellets through the rifle.   

Regulator spool, bottom: -007 90 durometer with OD abraded to about 0.260" to fit inside groove of brass ring.  Original is M1.5x4.

tube caps: 2ea -117 90 durometer.  Others reported using 70 durometer with success; doesn't seem this one is apt to extrude like the ones on the regulator body.

air tube (into receiver): M2x14 70 durometer.  Originals appear to be M1.5x17 and are a loose fit...didn't feel adequate when inserting the tube into the receiver.  The M2x14 stretches a bit to install, and the resulting fit to the receiver is snug.  90 durometer would probably get cut. 

fill probe: Factory ones are M1.5x3mm estimated 50 durometer.  They leak for the first 2 or 3 pump strokes until enough pressure has built for them to seal.  A 90 durometer of the same size would probably work _if_ it can be installed without tearing (has to stretch quite a bit...polyurethane might survive).  Ended up using -005 in 70 durometer with the ID abraded to match that of the metric.  Seals right away.

barrel band: M1 x 20

fill port: -007 (from memory, maybe -006...original had failed).  Bring the tapered screw down onto it with just a slight amount of interference. 

barrel .25cal (seals to bolt probe): -902 90 durometer (actual dimensions .240" ID .370 OD)

Tricky to install.  Seated a pellet into the leade, then inserted a short segment cut from a 1/4 dowel to fill the portion beyond the O-ring groove.  Then used a pick to work the O-ring into the groove.  The 90 durometer seems to be holding up well.

[Gertrude]

Jason,
Thank You for your time, efforts,  and very detailed info.
 I am very sure others (and myself) will find this list quite helpful.
 This kind of contribution is what makes GTA members the best.

 A big "High Five" to you Sir ! 

[Wayne52]

I know that I won't be sending mine back, I'm hoping I can make the 1911 spring plunger work, a person can do wonders with a dremel too, modern day gun smiths would probably be lost without their dremel. 

[Gertrude]

Never mess with a man's Truck, Dog, Motorcycle,.... OR HIS DREMEL !     

[Bob Pratl]

Jason, thanks for putting this together, much appreciated.

[Wolverineshooter]

Great work, Jason. Timely.

[nervoustrigger]

No problem, guys...just sharing in the old GTA tradition.